Operating panel

A typical application often includes two interlocked key units to isolate power to the panel and ensure a specific sequence of operation. 

Using the panel, the operator can select to close the valves and then isolate the panel by removing the ‘A’ Key. This is entered into the solenoid key unit and when the SAS system confirms all valves are closed, a permissive signal is sent to energise the solenoid and release the ‘B’ key. This allows the operator to safely continue the mechanical interlocking sequence, for example, to manually unlock a pig trap door to load or unload a pig.